rust-clippy/tests/ui/redundant_slicing.rs
Jason Newcomb 0ff68bb151
Improve redundant_slicing
Fix bad suggestion when a reborrow might be required
Fix bad suggestion when the value being sliced is a macro call
Don't lint inside of a macro due to the previous context sensitive changes
2021-03-25 22:30:14 -04:00

32 lines
703 B
Rust

#![allow(unused)]
#![warn(clippy::redundant_slicing)]
fn main() {
let slice: &[u32] = &[0];
let _ = &slice[..];
let v = vec![0];
let _ = &v[..]; // Changes the type
let _ = &(&v[..])[..]; // Outer borrow is redundant
static S: &[u8] = &[0, 1, 2];
let err = &mut &S[..]; // Should reborrow instead of slice
let mut vec = vec![0];
let mut_slice = &mut *vec;
let _ = &mut mut_slice[..]; // Should reborrow instead of slice
macro_rules! m {
($e:expr) => {
$e
};
}
let _ = &m!(slice)[..];
macro_rules! m2 {
($e:expr) => {
&$e[..]
};
}
let _ = m2!(slice); // Don't lint in a macro
}